The Pentagon has begun notifying would-be observers that it plans to hold the first session of the long-awaited parole-style boards at Guantánamo in secret.

President Barack Obama ordered his administration to set up the so-called Periodic Review Boards March 7, 2011. In July, Defense Department officials said the boards would review the files of 71 Guantánamo prisoners’ cases — 46 so-called “indefinite detainees” and 25 men once considered candidates for war crimes trials.

Now, as the administration is poised to hold the first hearing — on Nov. 20 at Guantánamo, with 33-year-old captive Mahmud al Mujahid’s plea for release — the Pentagon says it’s unprepared to let reporters watch.